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Particles and Fields

Eur. Phys. J. C 16, 349-359
DOI 10.1007/s100520000199

Implications of color-string percolation on multiplicities, correlations, and the transverse momentum

M.A. Braun1 - C. Pajares2

1 High-Energy Physics Department, S. Petersburg University, 198904 St. Petersburg, Russia
2 Departamento de Física de Partículas, Universidade de Santiago de Compostela, 15706-Santiago de Compostela, Spain

Received: 13 July 1999 / Published online: 8 June 2000 - © Springer-Verlag 2000

In the color-string model, the impact of string percolation on multiplicities, $\langle p_\mathrm{T}^2\rangle$, and their long-range (forward-backward) correlations is studied. It is assumed that different string overlaps produce the observed hadrons independently. The multiplicities are shown to be damped by a simple factor which follows from the percolation theory. The $\langle p_\mathrm{T}^2\rangle$ rise at the same rate as multiplicities fall. A clear signature of the percolation phase transition is found to be the behavior of the forward-backward correlations for intensive quantities, such as $\langle p_\mathrm{T}^2\rangle$ or its inverse, which can be detected in the relativistic heavy-ion collider.

Copyright Società Italiana di Fisica, Springer-Verlag 2000